Gasket cutter



May 22, 1928. 1,670,628

J. E. MAHIN GASKET CUTTER Filed March 24, 1926 INVENTOR J. E. Mall in Patented May 22, 1928.

JAMES'E. mnrnmor sTooKTon, CALIFORNIA.

GASKET CUTTER.

Application'filed March" 24, 1926. Serial No. 96,934.

This invention relates to for cutting gasketsand the like,

pal object being to provide 1 01- the purpose so constructed that ring improvements my princian implement gaskets or washers maybe quickly and easily cut from any material an erable thickness;

orifices in any material when to provide an orifice rather d to a consid as well as cutting. circular the purpose is than to shape and keep the piece cut out from the mate rial.

Another object of vide a device of this character the invention is to prohavmg a pair of cutters so arranged that they may be eas ily and independently adjus different diameters, ternally of a gasket, as well depths; and when desired eitl ted to cut to both externally and inas to different ier cutter may be rendered inoperative without actually removing the same from the device.

The

cutters may also be readily removed or replaced when desired.

' A further object of the invention is to produce a simple and inexpensive device. and yet one which Wlll be exceedingly efiecit is designed,

ti've for the purpose for which These objects I accomplish by means of such structure and relative-arrangement oi parts as will fully appear from a of the following specification perusal and clalms.

In the drawings similar characters of reference indicate corresponding parts in the several views Fig. 1 is a side elevation of the cutter Fig. 2 is a sectional elevation of the same with the shank broken away.

Fig. 3 is. a plan view of'thedevice looking at thefac'eplate.

Fig. 4: 1s a side elevation of the device showing a modified form of shank or centering means.

Referring now more characters of reference on numeral 1 denotes a disc-like a head, provided particularly to the the drawings the plate, forming with a central hub 2 through which a shank 3 removably projects, this shank being held ment relative to the-head by or the like. One end of the vided with a squareor othe portion'5 to fit a drill chuck ing means. provided with a centering Disposed parallel to the spaced relation to the same a against movea set screw l shank is pror non-circular or other turn- The other end of the shank is point 6.

head plate 1, in

nd toward the shank point a. faceplate .7, which the point of the shank projects.

, through This plateis smooth on its outer surface but is the hub 22, as shown at 9.

Screws 10 passed through the head 1 adjustab'ly screw into the plate 7,. with. compression springs 10 on the screws'between these plates, holding theplate 7' yieldaloly at its limit of movement away from the plate 1.; The amount .to which the plates may approach each other with the compres-z sion of the springs may. be adj ustably limited by means ot a rod 11 screwed through the plate 1 and approaching the plate 7 Cutter supports 12 depend from the-"head 1 towardthe plate'l, being mounted for radial sliding movement in'the head by slots 13 in the latter into which the supports pro-' ject. Radial screws M mounted in the head are threaded through the supports to enable the same to be adjusted longitudinal.- ly of the slots, thus'enabling the,distance of the cutters from the shank to; be easily and independently adjusted. The supports are clamped in any desired position by screws 15 which are threadedinto thepor tions of the supports which project into the slots, the heads of the screws-overhanging thesides ot the slots. Cutters 16 abut against the sides of the supports and project snugly through radial slots. 17 in the, face plate parall'elytothe slots 13 as shown .in Fig. 3. Grraduat-ion marks 17 are placed along the slots 17, on the outside 0t the plate, so that the cutters may be easily adjusted for difierent radii of cut. The cutters are removably andadjustably mounted onthe supports byscrews 18 which passthrough slots 19 provided in the supports parallel. totne plane of the shank.

the cutters are adjusted to the face plate the desired distance, which should be but slightly "greater than the thickness of the material to be operated on.

The blank of material is then laid on a, I

table or the like, preferably wood, and the downward and rotative pressure is plied to the shank to cause the ent1re-strucas well ascuttlng the cutters to j from the I ject therethrough.

then threaded onto the shank and abut.

. ters of different kin center point 6 is pressed into the same so that the face plate engages the blank. A

then apture to turn, project through the faceplate and cut the material.

material first, thecenter piece will be cut out gasket being formed before the gasket itself is disassociated from the blank. There will therefore v gasket turning with the face plate while being formed and beforeits center portion is'cut out. The depth to which the cutters can project being controlled by the adjusting rod 11, there need be no possibility of the cutters projecting through the blank a sufficient depth to deeply score the supporting bench or table. The face plate bearing against the blank with the pressure of the springs therebetween, the blank is preventedfrom wrinkling or pulling out of round while being cut, in the event thatthe material is of a flexible nature.

Ifit is desired to cut a holein a fixed member, such. as in the metal sheathing plate 20 of'a dashboard 21', as to install an.

instrument therein, the shank 3 is removed andisrepl'a-ced by a shank 3 threaded at one end instead of having the centering point. through the dashboard and sheathing to enable the, threaded end of the shank to pro- One'or more nuts 22 are against the'back face of the dashboard; If

the nuts are then held from turning and a applied to the shank 3, be advanced toward the face plate abutted against the sheathing and the cutters will project from the face plate and engage the sheathing to cut through the same. The sheathing having been cut and, the piece removed the-wood therebehind may of course be cut to follow the orifice in the metal by meansof an ordinary keyhole saw.

In such operations one or the other of the cutters are restricted so as not toengage the work, since moved.) This threaded shank arrangement may of course also be used in any place suitable and where a relatively great pressure is'desired.

It is of course to rotative pressure is the head-plate will be understood that cutis are necessary for cutting different kinds obvious that a cutter suitable for cutting hard metal would be of a different shape from onensed to cut through fibrous and other similar materials.

From the foregoing description it will be Jeadily seen that I have produced such a de- The inner cutter engaging the-Qv be no danger of the A relatively small hole is drilled a single disc only is to be rev of material, since it is.

vice as substantially fulfills the objects of the invention as set forth herein.

While this specification sets forth in detail the-present and preferred construction of the device, still in practice such devia tions from such detail may be resorted to as do not form a departure from the spirit of the invention, defined by the appended claims.

Having thus described-my invention What I claim as new and useful and desire to secure by Letters Patent is:

1. A gasket cutter comprising a face plate having acentering element, said plate'having a radial slot, a cutter to project throughthe' slot, a head spaced from the plate and 'operatively connected to the plate to rotate therewith, said head having a slot alincd with the'plate slot, a support to which the cutter is attached slidable along the head j slot, and a radial screw passed through the support and mounted in the head to adjust the position of the support lengthwise of the slot.

A gasket cutter comprising a face plate. having a centering element, said plate hav-' ing a radial'slot, a cutter to project through the slot-, 'a head spaced from the plate and operatively connected to the plate to rotate therewith, said head having a slot alined with the plate slot, a" support to which the cutter is attached slidable along the head slot, a radial screw passed through the support and mounted in the head to adjust the position of the support lengthwise of the slot, and means between the support and head forclamping said support inany posi- 'tion to which it may be moved by adjustment of the screw. I

3. A gasket cutter including a slotted face plate, a cutter head carrying a cutter to move through the slot in the face plate, means to removably and adjustably connect the face plate to the head and including screws freely movable longitudinally through the head and threaded into the face plate, andmeans to hold the head and face plate apart. v

41-. A. gasket cutter includingthecombinw tion of a slotted face plate, a cutter head carryii'ig a cutter to move through the slot in the face plate, guide screws freely movable tl'irough the head and fixed to the face plate to maintain proper lateral position between the two'while at the same time allowing free relative longitudinal movement thereof and a sliding clutch engagement between the axesof the head and face plate to permit unitary rotation of the tworwithout placing any twisting strain on the guide screws.

In testimony whereofI affix my signature.

JAMES E. MAHIN 

